Coding style.

- Use constants instead of strings for mouse actions.

eris/__main__.py

@@ -651,10 +651,10 @@ class Help:
 
     def on_mouse_input(self, term_code, appearance_changed_event):
         event = terminal.decode_mouse_input(term_code)
-        if event[1] == 4:  # Mouse wheel up
+        if event[1] == terminal.WHEEL_UP_MOUSE:
             self.view.portal.scroll_up()
             appearance_changed_event.set()
-        elif event[1] == 5:  # Mouse wheel down
+        elif event[1] == terminal.WHEEL_DOWN_MOUSE:
             self.view.portal.scroll_down()
             appearance_changed_event.set()
 
@@ -935,10 +935,10 @@ class Screen:
                 term_code, self._appearance_changed_event)
             return
         event = terminal.decode_mouse_input(term_code)
-        if event[0] not in ["mouse press", "mouse drag"]:
+        if event[0] not in [terminal.PRESS_MOUSE, terminal.DRAG_MOUSE]:
             return
         x, y = event[2:4]
-        if event[0] == "mouse drag":
+        if event[0] == terminal.DRAG_MOUSE:
             last_x, last_y = self._last_mouse_position
             dx, dy = x - last_x, y - last_y
             if self._is_summary_focused:
@@ -946,9 +946,9 @@ class Screen:
             else:
                 self._move_listing((-dx, -dy))
         else:  # Mouse press
-            if event[1] == 4:  # Mouse wheel up
+            if event[1] == terminal.WHEEL_UP_MOUSE:
                 self.listing_page_up()
-            elif event[1] == 5:  # Mouse wheel down
+            elif event[1] == terminal.WHEEL_DOWN_MOUSE:
                 self.listing_page_down()
             else:
                 view_width, view_height = \

eris/terminal.py

@@ -77,20 +77,29 @@ def interactive():
         termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_termios_settings)
 
 
+RELEASE_MOUSE = 0
+DRAG_MOUSE = 1
+CLICK_MOUSE = 2
+PRESS_MOUSE = 3
+
+WHEEL_UP_MOUSE = 4
+WHEEL_DOWN_MOUSE = 5
+
+
 def decode_mouse_input(term_code):
     keys = [ord(byte) for byte in term_code]
     b = keys[0] - 32
     x, y = (keys[1] - 33) % 256, (keys[2] - 33) % 256
     button = ((b & 64) / 64 * 3) + (b & 3) + 1
     if b & 3 == 3:
-        action = "release"
+        action = RELEASE_MOUSE
         button = 0
     elif b & 2048:
-        action = "release"
+        action = RELEASE_MOUSE
     elif b & 32:
-        action = "drag"
+        action = DRAG_MOUSE
     elif b & 1536:
-        action = "click"
+        action = CLICK_MOUSE
     else:
-        action = "press"
-    return ("mouse " + action, button, x, y)
+        action = PRESS_MOUSE
+    return (action, button, x, y)